import pandas as pd

#统计表格中第一列的字符串，并去重
df = pd.read_csv('dataset/electric_vehicles_spec_2025_clean.csv')
#统计表格中第一列的字符串，并去重
unique_brands = df['brand'].unique()
unique_model = df['model'].unique()
unique_segment = df['segment'].unique()
unique_car_body_type = df['car_body_type'].unique()
#输出结果
print(unique_brands)
print(unique_model)
print(unique_segment)
print(unique_car_body_type)